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MASS. EXPERIMENT STATION BULLETIN 397 



Figure 11. A. Poison ivy (Rhus toxicodendron L.), woody stem, flowers, fruit (berries), and 

 compound leaf, consisting of three leaflets. 



B. Poison sumac (R. vernix L.), woody stem, flower and 9-leaflet leaf. 



C. Poison sumac woody stem, fruit (berries), and 7-leaflet leaf. 



Drawn by S. J. Ewer. Approximately x 1/3. 



